Frequently Asked Questions

How is diamond carat weight rounded?


Diamonds are weighed to the thousandth (.001) of a carat (ct) and then rounded to the nearest hundredth (.01). The weight will only be rounded up to the nearest hundredth if the thousandth digit is a nine. For example, a stone that weighs 1.768 ct would be rounded to 1.76 ct, but one that weighs 1.769 ct would be rounded to 1.77 ct.

contact us

You are being redirected to GIA Alumni Association, LLC.

5